Pankerusano-sawa Creek (Locality A): Early Maastrichtian, Japan
collected by T. Nishimura 2009

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes - Mosasauridae
HMG-1528 - type
see common names

Geography
Country:Japan
Coordinates: 42.8° North, 142.0° East (view map)
Paleocoordinates:50.3° North, 127.9° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Maastrichtian 10 m.y. bin: Cretaceous 8
Key time interval: Early Maastrichtian Ammonoid zone:  Nostoceras hetonaiense
Age range of interval: 72.2 - 66 m.y. ago
Stratigraphy
Geological group:Yezo Formation:Hakobuchi
Stratigraphic resolution:bed
Stratigraphy comments: lower middle part of the Hakobuchi Formation; lowermost section of unit IVb of Matsumoto (1942, 1959).
Lithology and environment
Primary lithology: "carbonate"
Includes fossils?Y
Lithology description: calcareous nodule
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collectors:T. Nishimura Collection dates:Summer 2009
Metadata
Also known as:Panketosano-sawa; Pankerusanosawa
Database number:194131
Authorizer:P. Mannion Enterer:P. Mannion
Modifier:P. Mannion Research group:vertebrate
Created:2018-06-14 10:04:10 Last modified:2025-02-22 15:12:02
Access level:the public Released:2018-06-14 10:04:10
Creative Commons license:CC0
Reference information

Primary reference:
65937. T. Konishi, M. W. Caldwell, T. Nishimura, K. Sakurai, and K. Tanoue. 2016. A new halisaurine mosasaur (Squamata: Halisaurinae) from Japan: the first record in the western Pacific realm and the first documented insights into binocular vision in mosasaurs. Journal of Systematic Palaeontology 14(10):809-839 [P. Mannion/P. Mannion]

Secondary references:

59502 R. A. Otero. 2016. Taxonomic reassessment of Hydralmosaurus as Styxosaurus: new insights on the elasmosaurid neck evolution throughout the Cretaceous. PeerJ 4:e1777:1-60 [C. Boyd/C. Boyd/P. Mannion]